| 1 | SLQ | Skylink Express Inc | Callsign: Skylink, Formerly QuikAire Cargo Inc. | CDN | AVCODES |
| 2 | SLQ | St. Lawrence & Atlantic R.R. (Quebec) Inc. | 7/2000-7/2005 | | NAKINA |
| 3 | SLQ | St. Lawrence & Atlantic R.R. (Quebec) Inc. | Jul-00 | | NRHS |
| 4 | SLQ | ST. LAWRENCE & ATLANTIC RAILROAD (QUEBEC), INC. | | | PWRC |
| 5 | SLQ | St. Lawrence and Atlantic Railroad (Genesee & Wyoming) | | | RSRV |
| 6 | SLQ | ST LAWRENCE & ATLANTIC RAILROAD (QU | | | SCAC4 |
| 7 | SLQ | St. Lawrence & Atlantic R.R. (Quebec) Inc. | | CDN | TRAFFIC |
| 8 | SLQA | SELECT TRANSPORT INC | | | SCAC4 |
| 9 | SLQB | SCS LOGISTICS LLC | | | SCAC4 |
| 10 | SLQC | STRAIGHT LINE LOGISTICS LLC | | | SCAC4 |
| 11 | SLQF | SAADCO LOGISTIQUES INC | | | SCAC4 |
| 12 | SLQH | SOLIS, LORENA ENRIQUEZ | | | SCAC4 |
| 13 | SLQJ | S LOGISTICS LLC | | | SCAC4 |
| 14 | SLQK | SLICK | | | SCAC4 |
| 15 | SLQL | SLAC LOGISTICS LLC | | | SCAC4 |
| 16 | SLQP | S & L TRANSPORTATION SERVICES INC | | | SCAC4 |
| 17 | SLQQ | SIMARD, L TRANSPORT LTD | | | SCAC4 |
| 18 | SLQS | SEAL TRANSPORTATION INC | | | SCAC4 |
| 19 | SLQT | SHASTA LUMBER TRANSPORT | | | SCAC4 |
| 20 | SLQV | STARLITE SERVICES INC | | | SCAC4 |
| 21 | SLQY | SPEEDLINE SYSTEMS INC | | | SCAC4 |
